fix: use placeholder for empty inputs in block labels (#9987)

* fix: use placeholder for empty inputs in block labels

* chore: linting

Author: mikeharv

packages/blockly/core/block_aria_composer.ts

@@ -172,6 +172,13 @@ export function computeFieldRowLabel(
       return computeFieldRowLabel(inputs[index - 1], lookback, verbosity);
     }
   }
+  if (
+    input.type === inputTypes.VALUE &&
+    input.connection?.targetConnection === null &&
+    verbosity >= Verbosity.STANDARD
+  ) {
+    fieldRowLabel.push(Msg['INPUT_LABEL_EMPTY']);
+  }
   return fieldRowLabel.filter((label) => !!label);
 }
 

packages/blockly/tests/mocha/shortcut_items_test.js

@@ -843,7 +843,9 @@ suite('Keyboard Shortcut Items', function () {
       block.initSvg();
       block.render();
       Blockly.getFocusManager().focusNode(block);
-      this.assertAnnouncement('Begin stack, if, do, First category, has input');
+      this.assertAnnouncement(
+        'Begin stack, if, Empty, do, First category, has input',
+      );
     });
 
     test('Icon', function () {
@@ -853,7 +855,9 @@ suite('Keyboard Shortcut Items', function () {
       Blockly.getFocusManager().focusNode(
         block.getIcon(Blockly.icons.IconType.MUTATOR),
       );
-      this.assertAnnouncement('Begin stack, if, do, First category, has input');
+      this.assertAnnouncement(
+        'Begin stack, if, Empty, do, First category, has input',
+      );
     });
 
     test('Field', function () {
@@ -869,7 +873,9 @@ suite('Keyboard Shortcut Items', function () {
       block.initSvg();
       block.render();
       Blockly.getFocusManager().focusNode(block.getInput('DO0').connection);
-      this.assertAnnouncement('Begin stack, if, do, First category, has input');
+      this.assertAnnouncement(
+        'Begin stack, if, Empty, do, First category, has input',
+      );
     });
   });